/**
 * Copyright 2019-2022 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef GE_RANGE_VISTOR_H
#define GE_RANGE_VISTOR_H

#include <vector>

namespace ge {
template <class E, class O>
class RangeVistor {
public:
    using Iterator = typename std::vector<E>::iterator;
    using ConstIterator = typename std::vector<E>::const_iterator;

public:
    RangeVistor(O owner, const std::vector<E>& vs) : owner_(owner), elements_(vs)
    {
    }

    ~RangeVistor()
    {
    }

    Iterator begin()
    {
        return elements_.begin();
    }

    Iterator end()
    {
        return elements_.end();
    }

    ConstIterator begin() const
    {
        return elements_.begin();
    }

    ConstIterator end() const
    {
        return elements_.end();
    }

    std::size_t size() const
    {
        return elements_.size();
    }

    bool empty() const
    {
        return elements_.empty();
    }

    E& at(std::size_t index)
    {
        return elements_.at(index);
    }

    const E& at(std::size_t index) const
    {
        return elements_.at(index);
    }

private:
    O owner_;
    std::vector<E> elements_;
};
} // namespace ge
#endif // GE_RANGE_VISTOR_H
